Small update in doc
Small update in doc


Former-commit-id: 5d93b080756b5b1b5f442418fe9fd26559e8d025 [formerly a2fd767d8b2d9bda1fa70bfb08e9f508b21f1cba]
Former-commit-id: e05f7e8a2a812accd7c307c46bb38079e5c1e19f
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine